Disk Cleanup questions in downloaded program files

Archived from groups: microsoft.public.windowsxp.perform_maintain (More info?)

Downloaded program files are chosen by XP for cleanup by default. But on my
computer when I run cleanmgr.exe, it shows 0kb for Downloaded program files
but shows many activex controls in the folder itself. My question is - I
don’t know why this option is there in cleanmgr and what it does. If no files
are being deleted when “Downloaded Program Files� option is selected, then
why is this option available? What it does? My biggest concern is, in our
auto-disk cleanup, we do cleanup on this handler too. SO is there a chance
when we may delete some needed files here?